Machine for the production of tubing

ABSTRACT

A machine for producing protective flexible tubing from a profiled, helically wound strip, which comprises a strip guide and a pair of driven profiling rollers disposed after the strip guide, and for pre-profiling the strip. A driven plane profile plate finish-profiling said strip together with one of the profiling rollers, the rollers and the plate constituting profiling means. A freely rotating winding mandrel, the profiled strip being fed to the winding mandrel after being deflected by the plane profile plate, and a driven winding roller co-operates with the winding mandrel, to constitute winding means.

United States Patent Biihm 51 June 20, 1972 [541 MACHINE FOR THE PRODUCTION OF 2,305,587 12/1942 Lapp et al ..72/49 TUBING 3,457,749 7/1969 Smola ..72/so [72] Inventor: Friedrich Biihm, Vienna II, Austria Primary Exmmr mchard l Herbs [73] Assignee: Metailschlauchfabrik Joseph Ulbrich & Attorney-Ernest G. Montague Co., Vienna, Austria 7 221 Filed: on. 23, 1970 [57] ABSTRACT A machine for producing protective flexible tubing from a [21] Appl' 82935 profiled, helically wound strip, which comprises a strip guide and a pair of driven profiling rollers disposed after the strip [52] 0.8. 72/137 guide, and for pre-profiling the strip. A driven plane profile (1 37/12 plate finish-profiling said strip together with one of the profil- [58] Field Of Search 724135, 1361137, 142, 49, ing rollers the rollers and the plate constituting profiling 72/50; 219/62; 18/45 156/425 93/80 59 P! means. A freely rotating winding mandrel, the profiled strip being fed to the winding mandrel afier being deflected by the [56] References Cited plane profile plate, and a driven winding roller co-operates UNITED STATES PATENTS Wilh the winding mandrel, I0 constitute winding means.

1,471,057 10/1923 Phillips ..72/1 37 5 Claims, 3 Drawing figures PATENTEDJum 1572 3,670, 544

SHEET 10F 2 MACHINE FOR THE PRODUCTION OF TUBING The present invention relates to a machine for producing protective flexible tubing from a profiled, helically wound strip.

It is one object of the present invention to provide a machine for producing protective flexible tubing the manufacture of which is simplified and the output of which is improved.

It is another object of the present invention to provide a machine for producing protective flexible tubing which comprises a pair of driven profiling rollers arranged after a strip guide and for pre-profiling the strip, a driven plane profile plate which finish-profiles the strip together with one of the profiling rollers, a freely rotating winding mandrel to which the profiled strip is fed after being deflected by the plane profile plate, and a driven winding roller co-operating with the winding mandrel.

The angle of deflection of the profiled strip by the plane profile plate, which is preferably arranged horizontally, is 270'. According to the present invention, in order to prevent changes in profile during the deflection, correcting rollers are arranged at the side of and above the plane profile plate, the correcting rollers guiding the profiled strip during the. deflection thereof. Moreover, a profile lifter is arranged between the plane profile plate and the winding mandrel.

It is still another object of the present invention, wherein the profiling rollers, the plane profile plate, the correcting rollers, the profile lifter and the winding roller are adjustable for the purpose of adaptation to dilTerent diameters of protective flexible tubing. Scales may be provided as an aid to adjustment.

In the production of protective tubing with the machine according to the present invention, any deformation of the profile is avoided with certainty, as a result of which faultless manufacture is possible.

With these and other objects in view, which will become apparent in the following detailed description, the present invention will be readily understood in connection with the accompanying drawings in which:

FIG. 1 is a schematic side elevation of the machine designed in accordance with the present invention;

FIG. 2 is a top plan view thereof; and

FIG. 3 is an end view in the direction opposite to the direction of production.

Referring now to the drawings, a raw strip for producing a protective flexible tubing runs from a horizontal supply device (not shown) mounted fixedly on the machine over suitable guide rollers, over a limit switch (not shown), thereafter through a washing and lubricating bath and then through a laterally adjustable strip guide 1 to driven profiling rollers 2 and 3. The semi-profile or semi-section which is formed here is now guided round the profiling roller 3 and conveyed to a plane profile plate 4 arranged below the profiling roller 3 and cooperating therewith. The profile of the strip is finished between the profiling roller 3 and the plane profile plate 4.

The fully profiled strip is now deflected by the plane profile plate 4, preferably through 270, a correcting roller 5 preventing any deformation of the profile from the side and a correcting roller 6 preventing any deformation from above. The profiled strip finally reaches a profile lifter 7 and is fed thereby to a freely rotating winding mandrel 8. Above the winding mandrel 8 there is provided a driven winding roller 9, which seizes the profiled strip and, in co-operation with the plane profile plate 4, carries out the winding of the protective flexible tubing about the winding mandrel 8. The latter serves then exclusively as a caliber for the determination of the tubing.

The finished flexible tubing runs from the winding mandrel 8 by way of a bent tube to a receiving drum rotating about a vertical axis at the speed of the tube. These details are not shown.

The end of the strip delivered from the supply device of the machine actuates the limit switch hereinbefore mentioned,

which stops the machine before the end of the strip enters the strip guide 1. Tins end of the strip IS joined to the beginning of the next strip, for example by spot welding, and the machine can then be started again without any further manipulation.

A counting device is moreover installed in the machine and this device measures the length of raw strip worked up at any given time and actuates through a stop a limit switch, which stops the machine at the receiving drum after a desired length of flexible tubing has been produced. It is thereby possible to stop the machine from time to time, for instance, after producing 25 or 50 meters lengths of protective flexible tubing.

The winding mandrel 8 can be exchanged, so as to enable protective flexible tubings of different diameters to be produced with the machine. Moreover, for the purpose of adaptation to difierent diameters, the strip guide 1, the profiling rollers 2 and 3, the plane profile plate 4, the correcting rollers 5 and 6, the profile lifter 7 and the winding rollers 9 are adjustable, setting scales being provided for facilitating adjustment.

The details of the machine according to the present invention, which have been described and illustrated, serve only to explain the essence of the present invention, without restricting the same. The machine according to the present invention can be employed for any desired cross-sections and also for different materials.

While I have disclosed one embodiment of the present invention, it is to be understood that this embodiment is given by example only and not in a limiting sense.

I claim:

1. A machine for producing protective flexible tubing from a profiled, helically wound strip, comprising a strip guide,

a pair of driven profiling rollers disposed after said strip guide, and for pre-profiling said strip,

a driven plane profile plate finish-profiling said strip together with one of said profiling rollers, said rollers and said plate constituting profiling means,

a freely rotating winding mandrel, said profiled strip being fed to said winding mandrel after being deflected by said plane profile plate, and

a driven winding roller cooperating with said winding mandrel, to constitute winding means.

2. A machine, as set forth in claim 1, including correcting rollers, which guide said profiled strip during the deflection thereof and prevent changes in profile, disposed at the side of and above said plane profile plate 4.

3. The machine, as set forth in claim I, which includes a profile lifter disposed between said plane profile plate and said winding mandrel.

4. The machine, as set forth in claim 1, wherein said profiling means and said winding means comprise structurally and functionally a simple unit.

5. The machine, as set forth in claim 1, wherein the ratio of the diameter of said winding mandrel to the mean diameter of said plane profile plate is 1:2 to 1:8. 5. 

1. A machine for producing protective flexible tubing from a profiled, helically wound strip, comprising a strip guide, a pair of driven profiling rollers disposed after said strip guide, and for pre-profiling said strip, a driven plane profile plate finish-profiling said strip together with one of said profiling rollers, said rollers and said plate constituting profiling means, a freely rotating winding mandrel, said profiled strip being fed to said winding mandrel after being deflected by said plane profile plate, and a driven winding roller co-operating with said winding mandrel, to constitute winding means.
 2. A machine, as set forth in claim 1, including correcting rollers, which guide said profiled strip during the deflection thereof and prevent changes in profile, disposed at the side of and above said plane profile plate
 4. 3. The machine, as set forth in claim 1, which includes a profile lifter disposed between said plane profile plate and said winding mandrel.
 4. The machine, as set forth in claim 1, wherein said profiling means and said winding means comprise structurally and functionally a simple unit.
 5. The machine, as set forth in claim 1, wherein the ratio of the diAmeter of said winding mandrel to the mean diameter of said plane profile plate is 1:2 to 1:8.
 5. 